Phonon

effect.cpp
1/* This file is part of the KDE project
2 Copyright (C) 2005-2007 Matthias Kretz <kretz@kde.org>
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) version 3, or any
8 later version accepted by the membership of KDE e.V. (or its
9 successor approved by the membership of KDE e.V.), Nokia Corporation
10 (or its successors, if any) and the KDE Free Qt Foundation, which shall
11 act as a proxy defined in Section 6 of version 3 of the license.
12
13 This library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public
19 License along with this library. If not, see <http://www.gnu.org/licenses/>.
20
21*/
22#include "effect.h"
23#include "effect_p.h"
24#include "effectparameter.h"
25#include "effectinterface.h"
26#include "factory_p.h"
27
28#define PHONON_INTERFACENAME EffectInterface
29
30#ifndef QT_NO_PHONON_EFFECT
31
32namespace Phonon
33{
34Effect::~Effect()
35{
36}
37
38Effect::Effect(const EffectDescription &description, QObject *parent)
39 : QObject(parent), MediaNode(*new EffectPrivate)
40{
41 P_D(Effect);
42 d->description = description;
43 d->createBackendObject();
44}
45
46Effect::Effect(EffectPrivate &dd, QObject *parent)
47 : QObject(parent), MediaNode(dd)
48{
49}
50
51void EffectPrivate::createBackendObject()
52{
53 if (m_backendObject)
54 return;
55 P_Q(Effect);
56 m_backendObject = Factory::createEffect(description.index(), q);
57 if (m_backendObject) {
58 setupBackendObject();
59 }
60}
61
62//X Effect::Type Effect::type() const
63//X {
64//X P_D(const Effect);
65//X return d->type;
66//X }
67//X
69{
70 P_D(const Effect);
71 return d->description;
72}
73
75{
76 P_D(const Effect);
77 // there should be an iface object, but better be safe for those backend
78 // switching corner-cases: when the backend switches the new backend might
79 // not support this effect -> no iface object
80 if (d->m_backendObject) {
81 return INTERFACE_CALL(parameters());
82 }
84}
85
86QVariant Effect::parameterValue(const EffectParameter &param) const
87{
88 P_D(const Effect);
89 if (!d->m_backendObject) {
90 return d->parameterValues[param];
91 }
92 return INTERFACE_CALL(parameterValue(param));
93}
94
95void Effect::setParameterValue(const EffectParameter &param, const QVariant &newValue)
96{
97 P_D(Effect);
98 d->parameterValues[param] = newValue;
99 if (d->backendObject()) {
100 INTERFACE_CALL(setParameterValue(param, newValue));
101 }
102}
103
104bool EffectPrivate::aboutToDeleteBackendObject()
105{
106 if (m_backendObject) {
107 const QList<EffectParameter> parameters = pINTERFACE_CALL(parameters());
108 for (int i = 0; i < parameters.count(); ++i) {
109 const EffectParameter &p = parameters.at(i);
110 parameterValues[p] = pINTERFACE_CALL(parameterValue(p));
111 }
112 }
113 return true;
114}
115
116void EffectPrivate::setupBackendObject()
117{
118 Q_ASSERT(m_backendObject);
119
120 // set up attributes
121 const QList<EffectParameter> parameters = pINTERFACE_CALL(parameters());
122 for (int i = 0; i < parameters.count(); ++i) {
123 const EffectParameter &p = parameters.at(i);
124 pINTERFACE_CALL(setParameterValue(p, parameterValues[p]));
125 }
126}
127
128} //namespace Phonon
129
130#endif //QT_NO_PHONON_EFFECT
131
132#include "moc_effect.cpp"
133
134// vim: sw=4 ts=4 tw=80
This class describes one parameter of an effect.
Effects that can be inserted into a Path.
Definition effect.h:64
Effect(const EffectDescription &description, QObject *parent=nullptr)
QObject constructor.
Definition effect.cpp:38
EffectDescription description() const
Returns the description of this effect.
Definition effect.cpp:68
QList< EffectParameter > parameters() const
Returns a list of parameters that this effect provides to control its behaviour.
Definition effect.cpp:74
Provides a tuple of enduser visible name and description.
const_reference at(qsizetype i) const const
qsizetype count() const const
T qobject_cast(QObject *object)
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